[core] abstract api away from accessor/bufferview/buffer syntax about gltf-transform HOT 5 CLOSED

The problem partly comes down to this: meshes currently need references to the thing that stores their data, and accessors and buffers need to know where they're used to support deletes and some edits. This is compounded by indexed-based references, but would probably still be a problem with an ID-based scheme.

It may be better to represent the asset's resources as a graph. Allows bi-directional connectivity, and should make it (much) easier to iterate over connections to a resource.

Still unsure which part of the abstraction should own binary data after it's unpacked.

from gltf-transform.

This becomes ... so much easier if every Accessor is a self-contained TypedArray.

Certain transforms (split, interleave, draco) couldn't be applied in that form, and would have to be applied at the write stage. That's manageable though, e.g. with a modifiers stack stored on the container until it's written.

EDIT: Still need to track (possibly shared) references to Accessors though.

from gltf-transform.

API ideas:

// Asset, Scene, Node, Mesh, Material, Image, Animation
// Material --> [ TextureInfo, Texture, Sampler ] --> Image
// Mesh --> Primitive --> [ Accessor ] --> ?
// Animation --> [ Accessor ] -->

// Later: Skin, Camera, Light

container
  .meshes()
    .find((mesh) => mesh.name === 'Cog')
    .primitives()
      .forEach((primitive) => addAttribute(primitive));

^allow write stage modifiers to exist on other levels than the container? e.g. maybe we don't want Draco applying to everything? That seems like an over-optimization right now.

from gltf-transform.

Might be a good goal, before (any? many?) subpackages are written, to be able to roundtrip all the sample models. Maybe in-out isn't idempotent, but in-out-(in-out) should be. And rendering with validation afterward would be nice.

from gltf-transform.

.listNodes()

.listMeshes()

...

.pack()

• pack-split
• pack-draco
• pack-interleaved

.transform()

toFoo(container)

• to-html
• to-image
• to-stats
• to-graph
• to-console/string/tree

from gltf-transform.